This study examines how urban growth, policies, migration, and socioeconomics shape language use in public spaces, focusing on multilingual signage. Combining ethnography, sociolinguistics, and urban studies, it analyzes visibility of Tibetan and Standard Chinese in Rongwo (Longwu), a rapidly urbanizing town in Rebgong, Qinghai. With both languages officially recognized and new infrastructure emerging, the research investigates how state and community needs, ideologies, norms, and language contact create hierarchies and inequalities. It explores minority roles and policy effects on ethnolinguistic representation.